阅读说明：本技术 一种水泥高效选粉工艺方法及选粉系统 (Efficient cement powder selecting process method and powder selecting system ) 是由 吴元兵 于 2021-07-20 设计创作，主要内容包括：本发明公开了一种水泥高效选粉工艺方法及选粉系统,涉及水泥生产设备技术领域,选粉系包括上述倾斜输料装置,包括上述倾斜输料装置,所述倾斜输料装置包括传送组件以及两组相对设置的支架,所述传送组件安装在两侧支架间,所述支架底端固定安装支撑腿,所述传送组件包括传送带,所述传送带用于对粉料进行输送,还包括压实组件,升降机构带动第一压板在传送带表面上下往复移动,对传送带表面的粉料进行压实处理,伸缩机构推动第二压板朝向传送带的方向移动,将传送带表面两侧的粉料向内挤压,有效避免避免粉料从传送带两侧滑落,提高了粉料在传送带表面传送的稳定性,且避免粉料在传送过程中扬尘而污染空气环境。(The invention discloses a high-efficiency cement powder selecting process method and a powder selecting system, which relate to the technical field of cement production equipment, wherein the powder selecting system comprises an inclined material conveying device and a compacting assembly, the inclined material conveying device comprises a conveying assembly and two groups of oppositely arranged brackets, the conveying assembly is arranged between the two side brackets, supporting legs are fixedly arranged at the bottom ends of the brackets, the conveying assembly comprises a conveying belt, the conveying belt is used for conveying powder, the compacting assembly also comprises a compacting assembly, a lifting mechanism drives a first pressing plate to reciprocate up and down on the surface of the conveying belt to compact the powder on the surface of the conveying belt, a telescopic mechanism pushes a second pressing plate to move towards the direction of the conveying belt to extrude the powder on the two sides of the surface of the conveying belt inwards, the powder is effectively prevented from falling from the two sides of the conveying belt, and the stability of the powder conveyed on the surface of the conveying belt is improved, and the dust is prevented from flying to pollute the air environment in the conveying process.)

1. The high-efficiency cement powder selecting process method is characterized by comprising the following steps of:

s1, conveying the corresponding raw materials to a mixed material bin, a gypsum bin and a limestone bin through a conveying belt respectively, conveying the raw materials to a clinker bin through a clinker belt, and conveying the raw materials to a desulfurized gypsum bin through a desulfurized gypsum platform;

s2, opening valves of all bin bodies, allowing materials in the mixed material bin, the gypsum bin, the limestone bin, the clinker bin and the desulfurized gypsum bin to fall onto the surface of a conveying belt under the action of gravity, conveying the materials to a first lifting and conveying machine by the conveying belt, lifting and conveying the materials on the surface of the conveying belt to a logistics weighing bin by the first lifting and conveying machine, and weighing the materials by the logistics weighing bin;

s3, discharging the weighed materials into a roller press through a logistics weighing bin, and grinding the materials through the roller press;

s4, the materials ground by the roller press fall into a second lifting material conveyer, the second lifting material conveyer conveys the materials into a powder selecting machine, the materials are primarily selected by the powder selecting machine, the powder meeting the particle size standard in the selecting process is continuously conveyed into a dynamic powder selecting machine, and the large-particle powder not meeting the standard is discharged into a material flow weighing bin again to wait for the roller press to grind again;

s5, conveying the powder screened by the powder concentrator into a dynamic powder concentrator, screening the powder again by the dynamic powder concentrator, continuously conveying the powder with the standard particle size into the double-cyclone separator in the screening process of the dynamic powder concentrator, and discharging the large-particle powder which does not reach the standard into a logistics weighing bin again to wait for the secondary grinding treatment of the roller press;

s6, conveying the powder screened by the dynamic powder concentrator into a double-cyclone separator, performing dust removal treatment on the powder entering the double-cyclone separator, conveying the powder subjected to dust removal into a ball mill for grinding treatment, conveying the powder subjected to ball milling by the ball mill to a third lifting material conveyor, lifting the powder by the third lifting material conveyor and conveying the powder into a vortex powder concentrator;

s7, screening the powder conveyed to the inside of the powder sorting machine again through the vortex powder sorting machine, continuously conveying the powder reaching the particle size standard in the screening process to a storage box for storage, discharging the large-particle powder not reaching the particle size standard to a material flow weighing bin again through an inclined material conveying device for waiting for the roller press to grind and sort again, and circulating the steps until the powder sorting is completed.

2. A cement high-efficiency powder selecting system utilizing the process of claim 1, which comprises the inclined material conveying device, wherein the inclined material conveying device comprises a conveying assembly and two sets of oppositely arranged supports (2), the conveying assembly is arranged between the supports (2) at two sides, supporting legs (25) are fixedly arranged at the bottom ends of the supports (2), the conveying assembly comprises a conveying belt (1), the conveying belt (1) is used for conveying powder, and the system is characterized by further comprising:

the compaction assembly comprises a first pressing plate (5) and a second pressing plate (23), wherein the first pressing plate (5) is installed above the conveying belt (1) and connected with the lifting mechanism and used for carrying out vertical compaction treatment on powder on the surface of the conveying belt (1), and the second pressing plate (23) is installed on two sides of the conveying belt (1) relatively and connected with the telescopic mechanism and used for carrying out compaction treatment on the side face of the powder on the surface of the conveying belt (1).

3. The efficient cement powder selecting system according to claim 2, wherein the conveying assembly further comprises a driving mechanism, the driving mechanism comprises a driving motor (17), the two ends of the conveying belt (1) are oppositely provided with rotating rollers (11), the two ends of each rotating roller (11) are rotatably connected with the support (2) through connecting rods, the outer side wall surface of each rotating roller (11) and the inner side wall surface of the conveying belt (1) are provided with racks which are meshed with each other, the output end of the driving motor (17) is fixedly connected with a main gear (18), the driving motor (17) is fixedly connected with the support (2), the main gear (18) is meshed with a secondary gear (24), and the secondary gear (24) is fixedly connected with the rotating rollers (11) through connecting rods.

4. A cement high-efficiency powder selecting system according to claim 3, wherein the lifting mechanism comprises a rotary table (4), the rotary table (4) is rotatably mounted on the outer side of a support (2), a rotary roller (11) penetrates through the support (2) through a connecting rod to extend a fixed connection rotary table (4), one side of the surface edge of the rotary table (4) is provided with a bayonet (5), the outer side of the bayonet (5) is provided with a push plate (3), a through groove which is movably connected with the bayonet (5) in a matching manner is arranged between the push plates (3), the top end of each push plate (3) is connected with a push rod (19), one end of each push rod (19), which is far away from the push plate (3), is fixedly connected with a top plate (10), and one end, facing a conveying belt (1), of each top plate (10) is connected with a first press plate (5) through a buffering part.

5. The efficient cement powder selecting system according to claim 4, wherein the buffering component comprises a buffering rod (8), corresponding supports (7) are oppositely arranged at two ends of the top plate (10) and the first pressing plate (5), the buffering rod (8) is fixedly installed on one side, facing the top plate (10), of the support (7) below, the buffering rod (8) penetrates through the support (7) above and is in sliding connection with the support, a buffering spring (6) is arranged on the outer side of the buffering rod (8), and two ends of the buffering spring (6) are fixedly connected with the corresponding supports (7) respectively.

6. The efficient cement powder selecting system according to claim 5, wherein the telescopic mechanism comprises an air bag (15) and an air cylinder (13), the air bag (15) is installed between the top plate (10) and the first pressing plate (5), the air cylinder (13) is installed on two sides of the conveying belt (1) and fixedly connected with the support (2) relatively, the top of the air bag (15) is connected with the air cylinder (13) through an air conveying pipe (9), a piston (14) is arranged in the air cylinder (13), one end of the piston (14) far away from the air conveying pipe (9) is fixedly connected with a piston rod (22), and the piston rod (22) penetrates through the side wall of the air cylinder (13) and is fixedly connected with the second pressing plate (23).

7. A cement efficient powder separation system according to claim 6, characterized in that the lower end face of the second press plate (23) is flush with the upper end face of the conveyor belt (1).

8. The efficient cement powder selecting system according to claim 7, wherein clamping grooves (16) are oppositely formed at two ends of the brackets (2) at two sides, one end, far away from the conveyor belt (1), of the second pressing plate (23) is fixedly connected with the clamping plate (12), and the clamping plate (12) is in sliding connection with the clamping grooves (16).

9. The efficient cement powder selecting system according to claim 8, wherein positioning rods (21) are oppositely and fixedly mounted on the surfaces of the brackets (2) on two sides, movable seats (20) are arranged on the surfaces of the positioning rods (21), the movable seats (20) are slidably connected with the positioning rods (21), one sides of the movable seats (20) are fixedly connected with the push plate (19), and the other sides of the movable seats are fixedly connected with the top plate (10).

Technical Field

The invention relates to the technical field of cement production equipment, in particular to a high-efficiency powder selecting process method and a powder selecting system for cement.

Background

The cement is a powdery hydraulic inorganic cementing material, is added with water and stirred into slurry, can be hardened in the air or in water, and can firmly bond sand, stone and other materials together, the early mixture of lime and volcanic ash is very similar to the modern lime and volcanic ash cement, and the concrete made of broken stone by using the cement not only has higher strength but also can resist the erosion of fresh water or salt-containing water after being cured.

The cement needs to be subjected to a powder selecting process in the production and processing process, the powder needs to be conveyed in the powder selecting process, however, in the prior art, the powder is conveyed only through a single conveying belt, and in order to facilitate conveying, part of the conveying belt needs to be obliquely arranged, so that the conveying stability is poor when the powder is discharged to the surface of the conveying belt, and part of dust is easy to drift in the air in the conveying process to influence the air quality.

Disclosure of Invention

The invention aims to provide a high-efficiency powder selecting process method and a powder selecting system for cement, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a high-efficiency cement powder selecting process method comprises the following steps:

s1, conveying the corresponding raw materials to a mixed material bin, a gypsum bin and a limestone bin through a conveying belt respectively, conveying the raw materials to a clinker bin through a clinker belt, and conveying the raw materials to a desulfurized gypsum bin through a desulfurized gypsum platform;

s2, opening valves of all bin bodies, allowing materials in the mixed material bin, the gypsum bin, the limestone bin, the clinker bin and the desulfurized gypsum bin to fall onto the surface of a conveying belt under the action of gravity, conveying the materials to a first lifting and conveying machine by the conveying belt, lifting and conveying the materials on the surface of the conveying belt to a logistics weighing bin by the first lifting and conveying machine, and weighing the materials by the logistics weighing bin;

s3, discharging the weighed materials into a roller press through a logistics weighing bin, and grinding the materials through the roller press;

s4, the materials ground by the roller press fall into a second lifting material conveyer, the second lifting material conveyer conveys the materials into a powder selecting machine, the materials are primarily selected by the powder selecting machine, the powder meeting the particle size standard in the selecting process is continuously conveyed into a dynamic powder selecting machine, and the large-particle powder not meeting the standard is discharged into a material flow weighing bin again to wait for the roller press to grind again;

s5, conveying the powder screened by the powder concentrator into a dynamic powder concentrator, screening the powder again by the dynamic powder concentrator, continuously conveying the powder with the standard particle size into the double-cyclone separator in the screening process of the dynamic powder concentrator, and discharging the large-particle powder which does not reach the standard into a logistics weighing bin again to wait for the secondary grinding treatment of the roller press;

s6, conveying the powder screened by the dynamic powder concentrator into a double-cyclone separator, performing dust removal treatment on the powder entering the double-cyclone separator, conveying the powder subjected to dust removal into a ball mill for grinding treatment, conveying the powder subjected to ball milling by the ball mill to a third lifting material conveyor, lifting the powder by the third lifting material conveyor and conveying the powder into a vortex powder concentrator;

s7, screening the powder conveyed to the inside of the powder sorting machine again through the vortex powder sorting machine, continuously conveying the powder reaching the particle size standard in the screening process to a storage box for storage, discharging the large-particle powder not reaching the particle size standard to a material flow weighing bin again through an inclined material conveying device for waiting for the roller press to grind and sort again, and circulating the steps until the powder sorting is completed.

The utility model provides a high-efficient selection powder system of cement, includes above-mentioned slope feeding device, slope feeding device includes conveying assembly and two sets of supports that set up relatively, conveying assembly installs between both sides support, support bottom fixed mounting supporting leg, conveying assembly includes the conveyer belt, the conveyer belt is used for carrying the powder, still includes:

the compaction assembly comprises a first pressing plate and a second pressing plate, the first pressing plate is installed above the conveying belt and connected with the lifting mechanism and used for conducting vertical compaction processing on powder on the surface of the conveying belt, and the second pressing plate is installed on two sides of the conveying belt and connected with the telescopic mechanism and used for conducting compaction processing on the side face of the powder on the surface of the conveying belt.

Preferably, transfer assembly still includes actuating mechanism, actuating mechanism includes driving motor, the relative roller that changes that sets up in both ends in the conveyer belt, it is connected with the support rotation through the connecting rod to change the roller both ends, it is equipped with intermeshing's rack with conveyer belt inside wall surface to change roller lateral wall surface, driving motor output fixed connection master gear, driving motor and support fixed connection, master gear and pinion toothing, the pinion passes through the connecting rod and changes roller fixed connection.

Preferably, elevating system includes the carousel, the carousel rotates to be installed in the support outside, change the roller and run through the support through the connecting rod and extend the fixed connection carousel, carousel surface edge one side sets up the bayonet lock, the bayonet lock outside sets up the push pedal, be provided with between the push pedal with bayonet lock cooperation swing joint's logical groove, push pedal top connecting rod, the push rod is kept away from the one end and the roof fixed connection of push pedal, the roof is passed through buffering part towards the one end of conveyer belt and is connected with first clamp plate.

Preferably, the buffering part comprises a buffering rod, corresponding supports are arranged on the top plate and the two ends of the first pressing plate relatively, the buffering rod is fixedly installed on one side, facing the top plate, of the support and penetrates through the upper support and is connected with the upper support in a sliding mode, a buffering spring is arranged on the outer side of the buffering rod, and the two ends of the buffering spring are fixedly connected with the corresponding supports respectively.

Preferably, telescopic machanism includes gasbag and cylinder, the gasbag is installed between roof and first clamp plate, the cylinder relatively install in the conveyer belt both sides and with support fixed connection, the gasbag top is passed through the gas-supply pipe and is connected with the cylinder, set up the piston in the cylinder, the one end fixed connection piston rod of gas-supply pipe is kept away from to the piston, the piston rod runs through lateral wall of the cylinder and second clamp plate fixed connection.

Preferably, the lower end face of the second pressing plate is flush with the upper end face of the conveyor belt.

Preferably, the two ends of the support on the two sides are oppositely provided with clamping grooves, one end, far away from the conveyor belt, of the second pressing plate is fixedly connected with a clamping plate, and the clamping plate is connected with the clamping grooves in a sliding mode.

Preferably, the locating rods are fixedly mounted on the surfaces of the two sides of the support relatively, movable seats are arranged on the surfaces of the locating rods and are connected with the locating rods in a sliding mode, one sides of the movable seats are fixedly connected with the push plate, and the other sides of the movable seats are fixedly connected with the top plate.

Compared with the prior art, the invention has the beneficial effects that:

1) in the invention, the powder conveyed to the interior of the ball mill is screened again by the vortex powder concentrator, the powder reaching the particle size standard is continuously conveyed to a storage box for storage in the screening process, and the large-particle powder not reaching the particle size standard is discharged into a logistics weighing bin again by an inclined material conveying device to wait for a roller press to carry out grinding and sorting treatment, so that the powder sorting quality is improved, and the load of the ball mill is reduced;

2) the powder is at the in-process of slope feeding device surface transport, starts elevating system, elevating system drives first clamp plate reciprocating motion about the conveyer belt surface, carries out compaction processing to the powder that conveys the belt surface, starts telescopic machanism, elevating system is carrying out vertical compaction in-process to the powder, telescopic machanism promotes the direction removal of second clamp plate towards the conveyer belt, with the powder of conveyer belt surface both sides inwards extrudees, effectively avoids the powder to follow the conveyer belt both sides landing, has improved the stability of powder at conveyer belt surface conveying, and avoids the powder raise dust and air pollution environment in the data send process.

Drawings

FIG. 1 is a process flow diagram of a high-efficiency cement powder selecting process.

FIG. 2 is a schematic structural diagram of an inclined material conveying device in a high-efficiency cement powder selecting system.

FIG. 3 is a schematic structural diagram of the inside of an inclined material conveying device in a high-efficiency cement powder selecting system.

FIG. 4 is a schematic structural diagram of a side surface of an inclined material conveying device in a high-efficiency cement powder selecting system.

FIG. 5 is a schematic top view of an inclined material conveying device in a high-efficiency cement powder selecting system.

FIG. 6 is a schematic structural diagram of a conveyer belt of an inclined material conveying device in a high-efficiency cement powder selecting system.

FIG. 7 is a schematic structural diagram of an inclined material conveying device cylinder in a high-efficiency cement powder selecting system.

In the figure: 1-a conveyor belt; 2-a scaffold; 3-pushing the plate; 4-a turntable; 5-a bayonet lock; 6-a buffer spring; 7-support; 8-a buffer rod; 9-gas transmission pipe; 10-a top plate; 11-rotating rollers; 12-a card board; 13-a cylinder; 14-a piston; 15-air bag; 16-a card slot; 17-a drive motor; 18-a main gear; 19-push plate; 20-a movable seat; 21-a positioning rod; 22-a piston rod; 23-a second platen; 24-pinion gear; 25-support legs; 26-a protective housing; 101-a material conveying belt; 102-mixed material bin; 103-gypsum bin; 104-limestone silo; 105-a clinker belt; 106-a cooked material bin; 107-conveyer belt; 108-a desulfurized gypsum platform; 109-desulfurized gypsum bin; 110-a first lifting conveyor; 111-a logistics weighing bin; 112-a roller press; 113-a second lifting conveyor; 114-powder selecting machine; 115-dynamic powder concentrator; 116-inclined feeding device; 117-double cyclone separator; 118-ball mill; 119-vortex powder concentrator; 120-third lifting material conveyer.

Detailed Description

The technical solution of the present invention will be described in further detail with reference to specific embodiments.

Example 1

A high-efficiency cement powder selecting process method, which refers to fig. 1, and comprises the following steps: .

S1, conveying the corresponding raw materials to a mixed material bin 102, a gypsum bin 103 and a limestone bin 104 through a conveying belt 101, conveying the raw materials to a cooked material bin 106 through a cooked material belt 105, and conveying the raw materials to a desulfurized gypsum bin 109 through a desulfurized gypsum platform 108;

s2, opening valves of all bin bodies, allowing materials in the mixed material bin 102, the gypsum bin 103, the limestone bin 104, the cooked material bin 106 and the desulfurized gypsum bin 109 to fall onto the surface of a conveying belt 107 under the action of gravity, conveying the materials to a first lifting conveyor 110 by the conveying belt 107, lifting and conveying the materials on the surface of the conveying belt 107 into a logistics weighing bin 111 by the first lifting conveyor 110, and weighing the materials by the logistics weighing bin 111;

s3, discharging the weighed materials into a roller press 112 through a logistics weighing bin 111, and grinding the materials through the roller press 112;

s4, the materials ground by the roller press 112 fall into a second lifting material conveyor 113, the second lifting material conveyor 113 conveys the materials into a powder concentrator 114, the materials are primarily screened by the powder concentrator 114, the powder meeting the particle size standard in the screening process is continuously conveyed into a dynamic powder concentrator 115, and the large-particle powder not meeting the standard is discharged into a logistics weighing bin 111 again to wait for the roller press 112 to grind again;

s5, conveying the powder screened by the powder concentrator 114 into the dynamic powder concentrator 115, screening the powder again by the dynamic powder concentrator 115, continuously conveying the powder with the standard particle size into the double-cyclone separator 117 by the dynamic powder concentrator 115 in the screening process, and discharging the large-particle powder which does not reach the standard into the logistics weighing bin 111 again to wait for the re-grinding treatment of the roller press 112;

s6, conveying the powder screened by the dynamic powder concentrator 115 into a double-cyclone separator 117, performing dust removal treatment on the powder entering the double-cyclone separator 117, conveying the powder subjected to dust removal into a ball mill 118 for grinding treatment, conveying the powder subjected to ball milling by the ball mill 118 to a third lifting material conveyor 120, lifting the powder by the third lifting material conveyor 120, and conveying the powder to a vortex powder concentrator 119;

s7, screening the powder conveyed to the inside of the material sorting machine by the vortex powder sorting machine 119 again, continuously conveying the powder reaching the particle size standard to the storage box for storage in the screening process, discharging the large-particle powder not reaching the particle size standard to the material flow weighing bin 111 again by the inclined material conveying device 116 to wait for the secondary grinding and sorting treatment of the roller press 112, and repeating the steps until the powder sorting is completed.

Example 2

Referring to fig. 2-6, an efficient cement powder selecting system comprises the inclined material conveying device, the inclined material conveying device comprises a conveying assembly and two groups of oppositely arranged supports 2, the conveying assembly is mounted between the supports 2 on two sides, supporting legs 25 are fixedly mounted at the bottom ends of the supports 2, the conveying assembly comprises a conveying belt 1, the conveying belt 1 is used for conveying powder, the inclined material conveying device further comprises a compacting assembly, the compacting assembly comprises a first pressing plate 5 and a second pressing plate 23, the first pressing plate 5 is mounted above the conveying belt 1 and connected with a lifting mechanism and used for vertically compacting powder on the surface of the conveying belt 1, and the second pressing plate 23 is mounted on two sides of the conveying belt 1 and connected with a telescopic mechanism and used for compacting the powder side surface of the conveying belt 1;

specifically, in the present embodiment, the powder conveyed to the inside is screened again by the vortex powder concentrator, and the large-particle powder which does not reach the particle size standard falls on the surface of the conveyor belt 1, the conveying belt 1 drives the powder to move towards the direction of the material flow weighing bin, and in the conveying process of the powder, starting a lifting mechanism, driving a first pressing plate 5 to reciprocate up and down on the surface of the conveyor belt 1 by the lifting mechanism, compacting the powder on the surface of the conveyor belt 1, starting the telescopic mechanism, vertically compacting the powder by the lifting mechanism, telescopic machanism promotes the direction removal of second clamp plate 23 towards conveyer belt 1, inwards extrudees the powder of conveyer belt 1 surface both sides, effectively avoids the powder to follow 1 both sides landing of conveyer belt, has improved the stability of powder at the conveying of 1 surface of conveyer belt, and avoids the powder raise dust and air pollution environment in the data send process.

As a further scheme of the embodiment of the invention, the conveying assembly further comprises a driving mechanism, the driving mechanism comprises a driving motor 17, the two ends of the conveying belt 1 are oppositely provided with rotating rollers 11, the two ends of the rotating rollers 11 are rotatably connected with the bracket 2 through connecting rods, the outer side wall surface of the rotating rollers 11 and the inner side wall surface of the conveying belt 1 are provided with racks which are meshed with each other, the output end of the driving motor 17 is fixedly connected with a main gear 18, the driving motor 17 is fixedly connected with the bracket 2, the main gear 18 is meshed with a pinion 24, and the pinion 24 is fixedly connected with the rotating rollers 11 through connecting rods;

specifically, in this embodiment, the driving motor 17 is started, the driving motor 17 drives the main gear 18 to rotate, the main gear 18 drives the rotating roller 11 to rotate by meshing with the pinion 24, and the rotating roller 11 drives the conveyor belt 1 to transmit, so as to convey the powder.

As a further scheme of the embodiment of the invention, the lifting mechanism comprises a rotary table 4, the rotary table 4 is rotatably mounted on the outer side of the support 2, the rotary roller 11 penetrates through the support 2 through a connecting rod and extends to be fixedly connected with the rotary table 4, one side of the surface edge of the rotary table 4 is provided with a bayonet 5, the outer side of the bayonet 5 is provided with a push plate 3, a through groove which is matched and movably connected with the bayonet 5 is arranged between the push plates 3, the top end of the push plate 3 is connected with a push rod 19, one end of the push rod 19 far away from the push plate 3 is fixedly connected with a top plate 10, and one end of the top plate 10 facing the conveyor belt 1 is connected with the first press plate 5 through a buffer part;

specifically, in this embodiment, the driving motor 17 drives the turntable 4 to rotate in the driving process of the driving conveyor belt 1, the turntable 4 drives the top plate 10 to reciprocate in the vertical direction through the bayonet 5, the through groove, the push plate 3 and the push rod 19, and the top plate 10 drives the first pressing plate 5 to reciprocate above the conveyor belt 1 through the buffering component, so as to perform reciprocating compaction treatment on the cement on the surface of the conveyor belt 1.

As a further scheme of the embodiment of the invention, the buffer component comprises a buffer rod 8, two ends of the top plate 10 and two ends of the first pressing plate 5 are both provided with corresponding supports 7 oppositely, one side of the support 7 facing the top plate 10 below is fixedly provided with the buffer rod 8, the buffer rod 8 penetrates through the upper support 7 and is connected with the upper support in a sliding manner, the outer side of the buffer rod 8 is provided with a buffer spring 6, and two ends of the buffer spring 6 are respectively fixedly connected with the corresponding supports 7;

specifically, in this embodiment, the top plate 10 drives the first pressing plate 5 to move towards one side of the conveyor belt 1 and to contact with cement, and under the reaction force of the cement, the first pressing plate 5 drives the lower support 7 to move towards the upper support 7 and to press the buffer spring 6, and the buffer spring 6 converts the external acting force into the elastic force, so that the buffer effect between the first pressing plate 5 and the cement is improved.

As a further scheme of the embodiment of the invention, please refer to fig. 7, the telescopic mechanism includes an air bag 15 and an air cylinder 13, the air bag 15 is installed between the top plate 10 and the first pressing plate 5, the air cylinder 13 is installed at two sides of the conveyor belt 1 and fixedly connected with the bracket 2, the top of the air bag 15 is connected with the air cylinder 13 through an air pipe 9, a piston 14 is arranged in the air cylinder 13, one end of the piston 14 far away from the air pipe 9 is fixedly connected with a piston rod 22, and the piston rod 22 penetrates through the side wall of the air cylinder 13 and is fixedly connected with a second pressing plate 23;

specifically, in this embodiment, first clamp plate 5 extrudees gasbag 15 towards the in-process that roof 10 removed, gasbag 15 has not only improved the cushioning effect between first clamp plate 5 and roof 10, carries gas to cylinder 13 through gas-supply pipe 9 moreover, cylinder 13 promotes piston 14 and removes towards one side of conveyer belt 1, piston 14 promotes both sides second clamp plate 23 simultaneously inwards through piston rod 22, carries out the compaction processing to the cement both ends that lie in conveyer belt 1 surface, avoids the powder to follow conveyer belt 1 both ends landing.

As a further solution to the embodiment of the present invention, the lower end surface of the second pressing plate 23 is flush with the upper end surface of the conveyor belt 1.

As a further scheme of the embodiment of the invention, the two ends of the two supports 2 on the two sides are oppositely provided with the clamping grooves 16, one end of the second pressing plate 23, which is far away from the conveyor belt 1, is fixedly connected with the clamping plate 12, and the clamping plate 12 is in sliding connection with the clamping grooves 16, so as to improve the stability of the second pressing plate 23 in the moving process.

As a further scheme of the embodiment of the invention, positioning rods 21 are relatively and fixedly mounted on the surfaces of the brackets 2 at two sides, movable seats 20 are arranged on the surfaces of the positioning rods 21, the movable seats 20 are slidably connected with the positioning rods 21, one side of each movable seat 20 is fixedly connected with the push plate 19, and the other side of each movable seat 20 is fixedly connected with the top plate 10.

While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.